Detailed explanation of car audio service

In-vehicle audio related services, the following excerpts are based on some services of android11.

framework java layer

public CarAudioManager(Car car, IBinder service) {

mService = ICarAudio.Stub.asInterface(service);}-----bp, call service

public class CarAudioService extends ICarAudio.Stub implements CarServiceBase ---bn provides services

public class AppFocusService extends IAppFocus.Stub implements CarServiceBase,BinderInterfaceContainer.BinderEventHandler

public class CarBluetoothService extends ICarBluetooth.Stub implements CarServiceBase

public class CarMediaService extends ICarMedia.Stub implements CarServiceBase

public final class CarUserService extends ICarUserService.Stub implements CarServiceBase

framework native layer

/frameworks/av/media/libaudioclient/IAudioFlinger.cpp

class BpAudioFlingerClient : public BpInterface

class BpAudioFlinger : public BpInterface-----bp

class AudioFlinger :public BinderService,public BnAudioFlinger---bn

class AudioPolicyService :public BinderService,

public BnAudioPolicyService, public IBinder::DeathRecipient

class CameraService :public BinderService,

public virtual ::android::hardware::BnCameraService,

public virtual IBinder::DeathRecipient,public virtual CameraProviderManager::StatusListener

class MediaExtractorService : public BinderService, public BnMediaExtractorService

class MediaLogService : public BinderService, public BnMediaLogService

class AAudioService :public BinderService,public BnAAudioService,

public aaudio::AAudioServiceInterface

class NetdNativeService : public BinderService, public BnNetd

class VRAudioServiceNative :public BinderService,

public BnVRAudioService